https://docs.oracle.com/javase/jp/18/docs/api/java.base/java/nio/channels/MulticastChannel.html
MulticastChannel (Java SE 18 & JDK 18)
declaration: module: java.base, package: java.nio.channels, interface: MulticastChannel
java sejdk
https://developer.android.com/reference/java/nio/channels/MulticastChannel.html
MulticastChannel | API reference | Android Developers
api referenceandroiddevelopers